Afterward, Armstrong rehabbed the injury and continued his workouts in Pensacola, Fla., with training company EXOS. Last month, he returned to Michigan where has been working out on Grand Valley’s campus.

Before the hamstring injury Friday, Armstrong had 24 reps on the bench press (225 pounds), considered average for a lineman, but an encouraging total for Armstrong, who underwent shoulder surgery at the end of last season.

He also had a vertical of 32 inches and had a standing jump of 8 feet, 10 inches. He measured at 6-11/2 and 298 pounds.

After the injury, he went through a couple positional drills under the direction of Terry Heffernan, assistant offensive line coach with the Detroit Lions, but he was limited and struggled to avoid limping.

“At this point, we’ll just have to leave it to fate and hope for the best,” said Armstrong. “I just have to get healthy. I felt great coming in. I don’t know. Maybe God has a different plan for me.”

Armstrong, from Lansing Sexton High School, can be encouraged by former Grand Valley linemate Tim Lelito, who was overshadowed by touted receiver and teammate Charles Johnson at a pro day last year. But Lelito hooked on as a free agent with the New Orleans Saints, made the roster and even started two games last season.

Tim Morrison, Grand Valley’s offensive coordinator and offensive line coach the past four seasons, is hopeful for Armstrong.

“From a big picture, he and Tim are obviously the top two I’ve coached,” he said. “Outside of being a good athlete, he’s very explosive. He was able to do a lot of things with his body that most other guys couldn’t do – suddenness off the ball and an ability get off defenders so fast that guys just aren’t ready for him.”

Armstrong was one of seven players – six from Grand Valley - who participated in the pro day. The others were receiver Brandan Green, linebacker Luther Ware, cornerbacks Reggie Williams and Eric Thompson and Hunter Charneski, a defensive lineman who worked out at fullback. Brett Pasche, a linebacker from Hillsdale, also participated.